diff options
| author | Usama Arif <usama.arif@bytedance.com> | 2022-02-04 14:51:15 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-03-10 06:32:49 -0700 |
| commit | c75312dd592b31427caa88170b61fdc3ae5b2891 (patch) | |
| tree | 1c0d7db092564493b06549991bcb9a099f0f29f2 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 77bc59b498174ea4f120d477d2cd0cf90fc58235 (diff) | |
io_uring: avoid ring quiesce while registering async eventfd
This is done using the RCU data structure (io_ev_fd). eventfd_async is
moved from io_ring_ctx to io_ev_fd which is RCU protected hence avoiding
ring quiesce which is much more expensive than an RCU lock. The place
where eventfd_async is read is already under rcu_read_lock so there is no
extra RCU read-side critical section needed.
Signed-off-by: Usama Arif <usama.arif@bytedance.com>
Link: https://lore.kernel.org/r/20220204145117.1186568-4-usama.arif@bytedance.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions